What files do I need to modify for PayPal's HTTP header request changes?

Hi

I got this email (below) from PayPal. I'm running aMember 3.1.4PRO. The IPN URL for my site is: MYDOMAIN.com/amember/plugins/payment/paypal_r/ipn.php

What PHP files do I need to update in order to prevent problems from occurring on February 1, 2013?

Thanks,
Eric

PayPal Email Below:

######################################

In a bulletin dated October 18, 2011, we announced that we were going to expand the number of IP addresses for www.paypal.com to improve our site’s performance, scalability and availability. As part of this transition, we planned to discontinue support for HTTP 1.0 protocol starting February 1, 2013.

We have recently identified that this change may impact the ability of some of our merchants to perform IPN (Instant Payment Notification) post-back validation or PDT (Payment Data Transfer) posts to www.paypal.com. This happens when the IPN or PDT scripts use HTTP 1.0 protocol and do not include the "Host: www.paypal.com" header in the HTTP request.

Additional Details
Starting February 1, 2013, we will require all incoming requests to have a "Host" header which complies with HTTP 1.1 Specifications. This header was not required under HTTP 1.0. IPN and PDT scripts using HTTP 1.0 may start failing with "HTTP/1.0 400 Bad Request" errors after February 1, 2013, which will result in IPN messages not being validated successfully, or PDT scripts not being able to retrieve transaction information.

Action Required before February 1, 2013
Merchants need to update their IPN and/or PDT scripts to use HTTP 1.1, and include the "Host" header in the IPN postback script.

Example:

PHP
// post back to PayPal system to validate
$header .="POST /cgi-bin/webscr HTTP/1.1\r\n";
$header .="Content-Type: application/x-www-form-urlencoded\r\n";
$header .="Host: 'www.paypal.com\r\n';;

paypal_r.inc.php contains the following lines:

Code:

         
            $header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
            $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
            $header .= "Content-Length: " . strlen ($req) . "\r\n\r\n";

so would think you need to change the first line and add the new 'host' line.

Note the above was taken from V3.2.3

I sent an email to amember about this last week- they said amember was already compatible.

David

I'm using aMember 3.1.4PRO which isn't compatible.

However, we changed this:

PHP:

$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen ($req) . "\r\n\r\n";

To this:

PHP:

$header .= "POST /cgi-bin/webscr HTTP/1.1\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Host: www.paypal.com\r\n";
$header .= "Content-Length: " . strlen ($req) . "\r\n\r\n";

And this seems to be working.

Eric

I am running aMember 3.2.3 and I just want to confirm that it is compatible with PayPal's IPN changes. Thanks!

-Ryan

How do we know if our version is compatible?

I'm using 3.2.4, but I noticed my paypal_r.inc.php file shows:

$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen ($req) . "\r\n\r\n";
$fp = fsockopen ($this->paypal_domain, 80, $errno, $errstr, 30);
Is it compatible? Do I need to make any changes to the header information in this file?

If you read through the above posts then the answer would appear to be yes.

I did read through the above, but Paypal specifically says they are moving to HTTP 1.1 -- 3.2.4 says it's HTTP 1.0 and doesn't have the "HOST" specified.

Alex: Can you confirm re: 3.2.4 and whether my paypal_r.inc.php file is correct?

Even though I'm at 3.2.4, it has the following:

$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen ($req) . "\r\n\r\n";
$fp = fsockopen ($this->paypal_domain, 80, $errno, $errstr, 30);